Liquid-level indicator



May 20, 1930. E. A. ROCKWELL I LIQUID LEVEL INDICATOR Original Filed Ari'i 15, 1923 EDWARD erlnocxwlgnn, onions;

- This epplication is a olivisionofiny etppli-f "cation Serial No.s31,791 -fi1 1 Aprii s, 192e, The purpose of the invention t o becoverecl 111 v this application is-it'o provide fa; convenlenteconomical and eflective indicatingdevice for showing the-level ofliquid, particularly fuel I pply in the main fuel tail'lkfibf" anautomohileenglne Whose depth it'is desiifablejto haveatfall';tilnesin'dicatedfto one ;occup in the dIflVeDS seat at the frontof the machine. ,It

consists intlie elements and "features of-construction shownanddescrlbedas ind cated 1n the claims I Figure lis' a;diagrztmmaticlview showing the relative position of! theflnain fuel tankthe depth of Whose. liquid vc'ontents isto he indicated With'respect tothe engine.

, Figure 2 is a detail elevationwith the fec'e eplatepaftly brokenawayito disclose the interior ofth'e indicating device mounted on dashinsight of thefdriversl i I Q; 7 In the parent application abovementioned rthereg-is shown and described afconstru'ction the for"supplyingfuel "from a low; level main supply tank to the carburete'n ofthe engine *engine through; a conduit leading for dis charge into achamber formed a, tube, 35,

depending "in, the main"fuel tank,i 25,- froni by p ess'ure derivedrfromone cylinder ofthe whichchamber. a tube,- 69,;le"2icls out upwardlyfoiconnection'with the pressure gauge 70,;

mounted on the dashboardwo f-"th ehicle.

e in said: parent application and. will-ignot he s v furthendescribeclthep esent'application' I "which isFconceinecl vonlywiththe particular ISure and the-depth of liquidin the min tank.- 7 i For this purpose theindicaton, 0; mounted means of indicating to the driver that'p esasmentioned atth'e clashicomprises a casting,

7 0?, having a horizontal;p'zissageway,- 71, which communicates withfour or more V plu'ngers,' 77,78, 79 end,

and :full "positions the driver jvhenkjthe plunger,

v I e H iijvhen"the plunger,

the main tank all of which is fully set forth V isnAnn mfg 1wnnnnnco'ngoienmon; oncHIcAeo; mmomn oo ageo nnrrzon or VIRGINIAFQ 1four cylinders; ,73; 745;, 75

1923, Serial No'.h 6 31,791. D i fir 1ei1 and this epplieetion filed'nec e'mbei' I the seme1 s'ize5 butwhich haverprogressive differencesinweightidue to the cori'ng out of the sameto -diiferent "degrees; as,ls'lf own; in

dottecl-linefin Figure '2, indicating respectiye'r one-half, three-querters ofthe gasoline level in the fuelsupply reservoir,25. Each of theplungersjhas e piston; 80%;locatecl thereon,jl the movement of which,isv limited ini down 7 atch-directionbyQashOulcler, 80F, in the o i ca tng, t' inf h uhf l rd, movement: of e hichisIc ntrQIledbyganenn-ularprojection, v. e 80", at the-upper end of thecylinclerf ineach 1 instance. The shoulder, 80",-=ancl the; annular ly the onequarter,

projection; 80, c'o-opemte also as Valve seats? 5 sure in the indicator.

to prevent-the escape of the gesuncleirptese pThe upper ends of the vepertu es, 77', 'Z 8, '7 9 and 80, I preferably pi o ject above e glasscoveredslot, 815 inga dust; ',P f- 1' g,i; 2;' a ingg sm l en B2;- dfhQ.1 ing g1.m imteds il h e h=s that by ohservingthe positionsof thenespee v tive plungers'thelevel of thekgasoline in the I 1 main supplytank will always be knownito' of the car. The fuel supply cem- Vo r,'25,;is provided with the usual cap, at the fill ng opening haying avent eperture 84,;andpreferably at the :bottomof the: tank there'is 5a";depression," 85, "for receiving the 'lowei'endfof the fcecl'ingapparatusQ e e 1 U kItawill bennderstqocl'thet in the construe,tionj-thus described; the jclisappejarance- {from the slot,-,8l,-{ofthe plunger; 80, jv voulcl'indicate be kn w -that h s r c r i o ly h ljxof filling the tank promptly after the disap we e pe v of th p unger,78, showing the .ta.nk'

one quarter' empty.

I While I have d es 'cribedf'thi s intention in detail," it yvill beunderstood that 7 many t1ons=willbe of course-to attend to the matte'f ii

